After finall completeing the swap to my Nissan brakes and big arsed discs, I would like to do some calcs on the system volume and front/rear balance so that I can determine if the std m/cyl is OK (Mk2 is 15/16" bore), or I need to step up to the Mk3 master cylinder (1" bore).
The nissan caliper pistons are 1.590" front and 1.500" rear.